When comparing IQTell vs Quire, the Slant community recommends IQTell for most people. In the question“What is the best cross-platform to-do list app?”IQTell is ranked 14th while Quire is ranked 44th. The most important reason people chose IQTell is:

Available as a Chrome app on desktop operating systems and as an Android and iOS apps.

Pros

Pro

Works on all platforms

Available as a Chrome app on desktop operating systems and as an Android and iOS apps.

Pro

Integration with Box, Google Drive, Dropbox and OneDrive

Allows adding reference material to projects and actions linking to several known cloud services.

Pro

Application wide tagging system

Any item can be tagged, all tags are centrally managed. If Evernote integration is activated, tags are synced between IQTELL and Evernote.

Pro

Fast response from support

Support responds quickly to any questions you may have.

Pro

Feature rich

Integrated email, calendar, Evernote, project and task management, contacts all in one app.

Pro

Mark emails as received, sent to tasks, projects, or waiting for items

With a quick selection you can turn an email into a new task, add it to a project or create a waiting for item. The email is moved from your inbox but available in the task or project. If it's a "waiting for", it will automatically add the To into the Delegated To person.

If you're importing from Gmail, you can use Gmail labels as tags in IQTell.

Pro

Aggregation of email

Aggregates your email from all of your different email providers. Allows reading and managing your Exchange, Gmail, iCloud, etc emails all in one place. There's support for both unified inboxes and separate inboxes for each account.

Pro

Convert email to calendar appointment

Convert e-mails to calendar appointments. The e-mail will be linked to the appointment so that you can access it within the calendar event.

Pro

Full-time featured email and calendar client

Pro

Easy to customize

You can add custom fields to all item types, and add custom relationship between items (i.e a project can be linked to a customer or a mail linked to a contact).Define how data is copied when an item is copied into another (I.e a mail copied into an action or project).

Pro

Can convert evernote checkboxes to actions automatically

Just add checbox to an evernote note, tag the note with the "action" keyword and iqtell will convert checkbox to subtask automatically. Every checboxes will be automatically converted into a single subtask of an action with the evernote title as title.

Pro

Allow collaboration on projects and actions

Delegate project and actions to friend, coworkers, customer.Work together by adding content, discussing and planning each item.

Pro

The IQTell team listens to suggestions and requests from users

IQTell is being updated all the time to improve on an already great system!

Pro

Make recordings of trips and save via iPhone/iPad, recover them later using EOBD Facile application

Pro

Cross platform, sync and offline usage

Pro

Organizations, projects, task, hierarchical subtask and smart folders

Unlimited tasks/todo structures

Pro

Integration with calendar and github

I haven't dabbled with that though

Pro

Multiuser handling

Handle multiple users and assignments

Pro

It is free

As of now, at least.

Cons

Con

Discontinued as of August 1st, 2017

Con

Only works in Chrome

Not everyone wants to use Chrome.

Con

Doesn't integrate with IFTTT

Con

Unsure future

Some time ago IQTell were prepared to close due to lack of funds, but something must have happened (they received funding) that gave them another two years of life, but after those two years are over it's not sure what will happen.